I will just start with an example.
If my note has a sentence like this :
This is a classic example of a ==Bug == in the app.
and I have a note with the file name `Bug in the app’, the Obsidian wouldn’t identify it as an unlinked backlink for the note. But it should, regardless of the highlights. Same happens with a word or a part of the text is bold, italic , struck through or highlighted.
I couldn’t find any other bug reported on this issue.